Valve



(No Model.) 2'Sheets-Sheet 1. -A. SICKAFOOSE 8v W. E. WYATT.

(No Modl.) 2 sheets-sheen 2. A. SICKAPOOSE 8v W. E. WYATT.

VALVE.

Patented Mar. 23, 1897.

Nirn *rares ALBERT SICKAFOOSE AND VILLIAM EDWARD WYATT, OF LYONS, IO'WA.y

VALVE.

SPECIFICATION forming part of Letters-Patent N o, 579,186, dated March23, 1897.

Application filed March 17, 1896.

To @ZZ whom t may concern.-

Beit known that we, ALBERT SIcKAFoosE and WILLIAM EDWARD WYATT, citizensof the United States, residing at Lyons, in the county of Clinton andState of Iowa, have invented a new and useful Valve, of which thefollowing is a speciication.

Our invention relates to valves designed particularly for use inconnection with a steam feed cylinder for sawmillcarriages which supportlogs during the sawing operation, and also adapted for use in connectionwith steam-pump cylinders and steam-engine cylinders, the object in viewbeing to provide a steam-tight balanced valve requiring the minimumthrow to accomplish its adjustment to feed and exhaust the motive agent.

Further objects and advantages of this invention will appear in thefollowing descrip-v tion, and the novel features thereof will beparticularly pointed out in the appended claims.

In the drawings, Figure 1 4is a front view, partly in section, of afeed-cylinder apparatus embodying valves constructed in accordance withour invention. Fig. 2 is a longitudinal section of the improved valve.Fig. 3 is a transverse section of the same. Fig. l is a detail Viewofthe bushing detached. Fig. 5 is a detail view in perspective ofthemeans for connecting twin valves for simultaneous operation.

Similar numerals of reference indicate corresponding parts in all thefigures of the drawings.

` We have shown the valve embodying our invention in connection with asteam-feed cylinder l of the ordinary construction, and a valve 2 isarranged in communication with each end of the cylinder for admittingsteam to communicate motion in opposite directions to the piston 3.

The improved valve embodies a cylindrical casing 4, open at both endsand provided at diametrically opposite points with steamports 5 and 6and also at diametrically opposite points with cylinder and exhaustports 7 and 8, the eXhaust-port being branched, as shown at 8a and Sb.The casing is thickened,

as shown at 9, contiguous to and covering each port and is provided withan interiorlythreaded collar lO for the reception of a pipe.

Serial No. 583,564. (No model.)

Branches 11 and 11b of the steam -supply pipe 11 are threaded in theopenings communicating with the steam-ports 5 and 6. A connecting-pipe12 is threaded into the opening communicating with the cylinder-port?,and also is arranged in communication with the cylinder, and anexhaustpipe 13 is threaded into the opening communicating with thebranched exhaust-port 8.

A cylindrical bushing 14 is tightly fitted in the bore of thecylindrical casing, the same being preferably forced to place byhydraulic pressure, and this bushing is provided with steam-ports 15 and16, a cylinderport 17, and exhaust-ports 18, registering', respectively,with the corresponding ports in the casing and of less width than saidports in the casing. The ports in the casing are made of greater widththan required for the ad-l mission and exhaust of the motive agent,whereby in fitting new bushings to the casing any slight variation inthe disposition of the ports in the bushing will not render the deviceinoperative by partly closing and thus obstructing the openings.

The improved valve further embodies a rotary plug 19, preferably castsolid and subsequently bored and longitudinally slotted, as shown at 20,to form a plurality of gates 21, adapted to close the ports inthebushing. The object in employin ga branched exhaustport resides in thefact that the branches thereof may be closed and opened with the samethrow or movement of the plug as the steam-ports, while the capacity ofthe eX- haust-port is double that of each steam-port. The cylinder-portis permanently open, and the movement of the plug in opposite directionsalternately opens and closes the steam and exhaust ports, thesteam-ports being open when the exhaust-ports are closed, and viceversa.

The bushing is open at both ends and is equal in length with the casing,and the bore of the bushing is tapered continuously from one end to theother to receive the exteriorlytapered or conical plug, which is ofgreater length than the casing, whereby adjustment of the plug may beaccomplished to coinpensate for wear of the seat or inner surface of thebushing. The means which we employ for holding the valve-plug at the de-IOO sired adjustment to allow easy movement and at the same time preventleakage of steam embody an axial shaft or spindle 22, fixed in the endsof the plug and projecting beyond the extremities thereof, as shownclearly in Fig. 2. The ends of the spindle are provided withcenter-bearings 23, in which are seated center-points 24, formed uponthe inner extremities' of set-screws 25, said set-screws being threadedin axial guides 26, carried by brackets 27, bolted to the extremities ofthe casing. When the surface of the valve-plug or bushing becomes wornsufficiently to allow leakage, both plug and seat may be ground by theusual application of emery and oil and La continuous rotary movement ofthe plug, after which the plug may be adjusted and secured in thedesired position by means of the center-points. When the parts becomeworn to such an extent as to prevent further adj ustment, a new bushingmay be applied, and as the cost of a bushing is less than that of a plugit will be seen that the valve may be repaired and rendered practicallyas efiicient as when new without the expense incident to the repair ofvalves of the ordinary construction.

The ports, both in the bushing which forms the valve-seat and in theplug, are elongated parallel with the axis of the valve (see Fig. 2) tomake them of the requisite capacity with the minimum width in order toprovide for the reversal of the passage of fluid through the valve orthe alternate opening of the exhaust and steam ports with the minimumthrow of the plug.

Various means may be employed for communicating the necessary rockingmovement to the plug, according to the kind of cylinder in connectionwith which the valve is used, but when the valve is employed inconnection with steam-feed cylinders, as illustrated in Fig. l, anoperating or sawyers lever 28 is rigidly secured to one of theextensions of the plug-spindle 22, and is provided at intervals withcenter sockets or bearings 29, arranged in pairs upon opposite sides ofthe lever and spaced from the axis of the spindle to correspond withsimilar center sockets or bearings upon a corresponding lever of thecoperating valve at the opposite end of the steamfeed cylinder. Aconnecting-rod 30 is arranged between said levers and is provided at itsextremities with adjustable centerpoints 3l to engage said oppositecenter sockets or bearings, whereby the movement of one of the operatingor sawyers levers communicates motion simultaneously to the valveplugs.

The adjustable connection between the rod 30 and the levers provides forchanging the relative movement between the operating-lever 28 and thevalves.

It is obvious that when used in connection with pumps or steam-enginecylinders the valve embodying our invention may be operated by means ofeccentric or other Valvegear forming no part of our present inventionand being well known to those skilled in the art.

The bushing is counterbored, as shown at 32, between the ports thereinin order to reduce the wearing of the plug and facilitate grinding andlubrication, lubricating material being supplied by means of oil-cups33, located, respectively, at the ends of the casing and communicatingwith oil-holes 34, formed in the casing and arranged in registrationwith similar holes in the bushing.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing from the spirit orsacricing any of the advantages of this invention.

Having described our invention, what we claim is- 1. A valve having acylindrical casing provided in its seat with a lateral cylinder-port anda plurality each of steam and exhaust ports elongated parallel with theaxis of the casing, the exhaust-port being branched with its armsdeflected inwardly to tap the seat at intervals, and the steam andexhaust ports being of less width than the cylinder-port, and a rotaryplug seated in the casing and provided with alternate elongated openingsand gates arranged parallel with the axis of the plug, the division ofthe steam and exhaust ports providing for the reversal of the passage ofiiuid through the valve by the minimum movement of the plug,substantially as specified.

2. A valve having an open-ended cylindrical casing, an open-endedbushing removably fitted in the bore of the casing and having its boretapered longitudinally to form a seat, said bushing and casing havingregistering steam, cylinder and exhaust ports of which those in thebushing are elongated parallel with the axis of the casing, a hollowplug fitted in said seat and provided with longitudinal slots oropenings and intervening gates to cover said ports, said plug beinglongitudinally tapered, and means for holding the plug at the desiredadjustment to compensate for wear, substantially as specified.

3. A valve having a casing provided with opposite steam-ports andopposite cylinder and exhaust ports, the exhaust-port being branchedwith its arms deflected inwardly to tap the bore of the casing atintervals, an open-ended slotted bushing tted in the casing and havingports registering, respectively, with the steam and cylinder ports ofthe casing and with the branches of the exhaust-port therein, and ahollow rotary plug fitted in the bore of the bushing and provided withopenings and intervening gates to close said ports, substantially asspecified.

4. In a valve, the combination with a casing having a tapered open-endedseat and lateral ports, of a hollow rotary plug fitted in said seat andprovided with corresponding lateral ports, a spindle fixed axially tothe IOO IIO

plug and extending beyond the extremities thereof, threaded guidessupported by brach` ets secured to the extremities of the casing,

and center-points having threaded Shanks with opposite adjustablecenter-points to engage said center bearings or sockets whereby 15 theextent of relative movement of the connected valves may be varied tosecure proper coperation, substantially as specified.

In testimony that we claim the foregoing as our own we have heretoaffixed our signatures zo in the presence of two witnesses.

` ALBERT SICKAFOOSE.

WILLIAM EDWARD VYATT. Witnesses:

J. A. MADDEN, CLARA FLAvERs.

